Cushion-spring.



R. L. STEVENS.

CUSHION SPRING.

APPLICATION FILED DEc. 2. I9Is.

1,275,318. PatemedAug-13, 1918.

dttofmmzs UNITED STATES PATENT caricia.

ROBERT L. STEVENS, OF ALBION, MICHIGAN, ASSIGNOR TO NATIONAL SPRING- Sc WIRE COMPANY, OF ALBION, MICHIGAN, A CORPORATION OF MICHIGAN.

cusHroN-sPnING.

Specioation of Letters Patent. Y Patented Aug. 13, 1918.

Application led December 2, 1916. Serial No. 134,560.

To all whom t may concern;

Be it known that I, Ronn'r L. S'iavriNs, a citizen of the United States of America,

residing at Albion, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Cushion-S rings, of which the following is a speci cation, reference being had therein to the accompanying drawings.

The invention relates to cushion or seat springs of that type known as double-deck, in which there are two or more springs of different vtension placed in end-to-end relation to each other. It is the object of the invention to obtain a construction in which the springs of the double-deck are easily and securely fastened to each other and are also anchored tov an intermediate frame to prevent lateral displacement. To this end the invention comprises the construction as hereinafter set forth.

In the drawings:

Figure 1 is a perspective view of one of the strips forming the securing and anchoring connection between the double-deck springs;

Fig. 2 is a plan view showing the manner of engaging the springs of the upper deck with said strip;

Fig. 3 is a longitudinal section through the strip engaged with the upper deck springs and in the act of engagement with the lower deck springs;

Fig. 4 is a similar view with the upper and lower decks secured to each other;

Fig. 5 is a section through the completed structure.

A are the springs of the lower' deck, which are preferably formed of wire of a larger gage than those forming the upper deck so as to be of greater tensile strength. These lower deck springs are first assembled and secured to a. suitable supporting base frame, which as shown comprises a wire border frame B and a series of crossstrips C, said strips being secured to the springs by struck-out tongues D clenched over the base coils thereof. To secure the upper deck springs in position, these are rst attached to sheet-metal strips E, which have struck-out therefrom the tongues F initially arranged in a plane parallel to the` plane of the strip and positioned to embrace the base coil G of each upper deck spring from diametrically opposite sides thereof. The springs are placed in engagement by slipping them laterally beneath the tongues F, as illustrated in Fig. 2. The tongues are then bent downward to extend through the apertures H in the strip formed by the original striking-out of the tongues, as shown in Fig. 3. The strips E are then assembled in an intermediate frame, preferably comprising a border wire I which has kinks or bends J therein for positioning and locking the ends ofthe strips. The latter are provided with tongue portions K at their ends, which are ybent over the links J and when clenched thereto will serve to securely hold the strips within the frame I. The frame I with the upper deck springs secured. thereto is then placed over the frame B with the lower deck springs, and the depending tongues F are inserted with- 1n the upper coils of the registering lower deck springs. A suitable clenching tool is then used to turn over these tongues, as shown at L, Fig. 4, which will lock the two decks to each other and also securely hold the complementary upper and lower springs 1n registration with each other. v

The construction as described is one in which the elements may be formed at small cost, while the operation of assembly is quickly performed. When complete the springs for both decks are securely positioned and anchored so as to avoid danger of accidental displacement.

What I claim as my invention is:

1. In a cushion spring, the combination with lower and upper abutting deck springs, of a sheet-metal strip having struck-out tongue portions for embracing the coils of one of the decks, said tongues beingk also bent into engagement with the abutting coil of the other deck to secure said decks to each other.

2. In a cushion spring, the combination with lower and upper abutting deck coil springs, of a sheet-metal strip extending between the abuttingcoils of,v the lower and upper decks, said strip having struck-out tongues for embracing the base coil of one deck and bent through the aperture inthe strip into engagement. with the coil of the other deck to secure said decks to each other.

3. A cushion spring, comprising lower and upper abutting deck coil springs, an intermediate frame comprising a borderv wire and cross-strips of sheet-metal arranged in alnement with rows of springs, said strips being providedv with struck-out tongues for embracing the base coils of the upper deck springs and bent downward through the apertures in said strip and clenched about the abutting coils of the lower decl; springs.

4. In a cushion spring, the combination with lower and upper abutting deck springs,

- @A nsvie of an intermediate frame, and means ex- 10 tending from one side of said frame and embracing the adjacent coil of the deck spring upon said side, said. means extending upon tlie opposite side of 'said frame and embracing the adjacent coil of the deck 15 spring upon said opposite side. e

In testimony whereof li aiiix my si ature.

HUBERT L. STE ENS. 

